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Analog Devices Inc./Maxim Integrated DG445DY+T
- Part No.:
- DG445DY+T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Package:
- 16-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
DG445DY+T.pdf
- Description:
- IC SWITCH SPST-NOX4 85OHM 16SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:1,871
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Product details
Overview
DG445DY+T from Maxim Integrated is a quad, normally open (NO), single-pole/single-throw (SPST) analog switch IC designed for precision signal routing in bipolar and single-supply systems. It features 85Ω max on-resistance, <5nA off-leakage at +85°C, 10pC max charge injection, 250ns max tON, and operates from ±4.5V to ±20V or +10V to +30V supplies - enabling use in test equipment and battery-operated audio routing.
For engineers reviewing the DG445DY+T datasheet, DG445DY+T pinout, DG445DY+T application, or DG445DY+T equivalent, key selection criteria include guaranteed RON matching (4Ω max), rail-to-rail analog signal handling (±15V), TTL/CMOS logic compatibility, ESD tolerance (2000V min), and -40°C to +85°C industrial temperature rating.
Technical Context
The DG445DY+T implements four independent SPST switches with complementary control logic (active-high enable), fabricated using a 44V silicon-gate process. Each channel guarantees matched on-resistance (≤4Ω) and flat on-resistance (≤9Ω) over the full analog signal range under bipolar supply conditions.
It supports dual-supply operation (±4.5V to ±20V) and single-supply operation (+10V to +30V), with VL pin configurable for TTL (5V) or CMOS (V+) logic thresholds. Switching is bidirectional, with rail-to-rail signal capability and low power consumption (35µW max).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| On-Resistance (RDS(ON)) | 85Ω max - ensures minimal signal attenuation and voltage drop in precision analog paths |
| On-Resistance Matching | 4Ω max - enables accurate channel-to-channel signal gain/phase tracking in multi-path systems |
| Charge Injection | 10pC max - reduces sampling error and pedestal distortion in sample-and-hold and ADC front-ends |
| Off-Leakage Current | <5nA at +85°C - maintains high-impedance isolation in battery-powered or high-precision DC-coupled circuits |
| Switching Time (tON/tOFF) | 250ns / 70ns max - supports fast multiplexing in automated test equipment and real-time signal switching |
| Analog Signal Range | ±15V - allows full-rail operation with ±15V op-amps and data acquisition systems |
| ESD Tolerance | 2000V min (HBM) - improves robustness during board handling and system integration |
Pinout & Package
Package: 16-pin narrow SO (Small Outline) - surface-mount, 150 mil body width, RoHS-compliant, JEDEC MS-012AC compliant.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| IN1–IN4 | Logic Control Inputs | Active-high digital inputs controlling respective SPST switch states (NO configuration) |
| D1–D4 | Drain Terminals | Switch output nodes; bidirectional current flow; connect to load or downstream circuitry |
| S1–S4 | Source Terminals | Switch input nodes; bidirectional current flow; connect to signal source or upstream path |
| V+ | Positive Supply Rail | Bias for internal circuitry and switch conduction; connected to substrate; must be ≥ V- + 10V |
| V- | Negative Supply Rail | Reference for bipolar operation; sets lower bound of analog signal range |
| GND | Ground Reference | Logic ground reference; separate from analog signal ground in mixed-signal layouts |
| VL | Logic Supply Input | Defines logic threshold: 5V for TTL compatibility, tied to V+ for CMOS-level inputs |
Key Features
| Feature | Design Value |
|---|---|
| Quad SPST NO Configuration | Four independent, non-latching switches with active-high control - simplifies PCB layout and logic interface in multi-channel routing |
| RON Flatness Guarantee | 9Ω max variation across ±15V signal range - preserves linearity in precision instrumentation and audio gain stages |
| Low Charge Injection | 10pC max - minimizes transient errors in sample-and-hold circuits and switched-capacitor filters |
| Bipolar & Single-Supply Operation | Supports ±4.5V to ±20V or +10V to +30V - eliminates need for external level-shifting in legacy and modern power architectures |
| Rail-to-Rail Signal Handling | Full ±15V analog swing - enables direct interfacing with industrial sensors, DAC outputs, and op-amp drivers without clamping |
Applications
| Test Equipment Multiplexing | Audio Signal Routing |
|---|---|
Use Scenario: Automated test systems route multiple sensor inputs to a shared DMM or oscilloscope channel. IC Role / Device Role / Timing Role: DG445DY+T acts as a low-distortion, low-leakage analog multiplexer enabling sequential channel scanning without cross-talk or offset drift. Use Value: 100dB crosstalk rejection and <5nA leakage at +85°C ensure measurement integrity across temperature and channel count. | Use Scenario: Portable audio mixer selects between microphone, line-in, and Bluetooth sources before preamplification. IC Role / Device Role / Timing Role: DG445DY+T serves as a zero-crossing–agnostic analog switch for source selection with no audible pop/click due to low charge injection (10pC). Use Value: Bidirectional conduction and rail-to-rail ±15V support allow seamless integration with both consumer and pro-audio signal levels. |
| Battery-Powered Data Acquisition | Military Radio Signal Conditioning |
Use Scenario: Low-power field logger samples thermocouples, strain gauges, and RTDs using a shared ADC. IC Role / Device Role / Timing Role: DG445DY+T provides channel isolation and signal path selection while drawing only 35µW static power. Use Value: Sub-5nA off-leakage at +85°C prevents thermal EMF errors in high-impedance sensor bridges, extending battery life. | Use Scenario: Secure comms radio routes IF signals between up/down-conversion stages and filtering banks under harsh environmental stress. IC Role / Device Role / Timing Role: DG445DY+T functions as a ruggedized analog switch in RF front-end signal conditioning, surviving 2000V HBM ESD events. Use Value: -40°C to +85°C rating and 44V process ensure reliable operation in extended-temperature military platforms without derating. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar analog switch applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| ADG1414BRUZ | 4-channel SPST, 1.8Ω typical RON, but requires ≥±4.5V dual supply only; no single-supply mode | Higher performance in low-RON precision apps; unsuitable for +12V-only systems | Select when ultra-low on-resistance and low distortion are critical, and supply architecture supports dual rails only |
| TS5A3157DCKR | Single-channel SPDT, 0.75Ω RON, 5V-only supply, smaller SC70-6 package | Not pin-compatible; limited to low-voltage consumer audio; lacks bipolar support and temperature range | Choose for space-constrained, single-switch, 3.3V/5V portable designs where industrial temp and ±15V swing are unnecessary |
Compared with ADG1414BRUZ and TS5A3157DCKR, the DG445DY+T uniquely balances wide supply flexibility (+10V to +30V or ±4.5V to ±20V), industrial temperature range, and guaranteed RON matching - making it optimal for field-deployable test gear and military-grade signal routing where supply and environmental constraints dominate.
Availability
DG445DY+T is available at Aetrix Electronics and suitable for test equipment multiplexing, battery-powered data acquisition, audio signal routing, and military radio signal conditioning requiring stable component supply across extended temperature and mixed-supply environments.
Supply support for DG445DY+T includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.
Manufacturer
Maxim Integrated (now part of Analog Devices) is a U.S.-based semiconductor company specializing in high-performance analog, mixed-signal, and power management ICs for industrial, communications, and computing markets.
The DG445DY+T belongs to Maxim's precision analog switch product line, engineered for applications demanding low distortion, high channel matching, and robust operation in demanding supply and thermal conditions.
FAQ
What is the maximum analog signal voltage range supported by the DG445DY+T?
The DG445DY+T supports an analog signal range of ±15V when operated with bipolar supplies (e.g., ±15V). This rail-to-rail capability is specified under V+ = +15V and V- = -15V conditions, and remains valid across the full -40°C to +85°C operating temperature range. The device does not clamp or distort signals within this range, making it suitable for interfacing directly with industrial op-amps and sensor interfaces.
Does the DG445DY+T support single-supply operation, and what is the minimum required voltage?
Yes, the DG445DY+T supports single-supply operation from +10V to +30V, with V- tied to ground. The minimum single-supply voltage is +10V - below this, on-resistance increases significantly and timing specifications degrade. At +12V, typical RDS(ON) is 100Ω–160Ω, and tON extends to 300–400ns, per the datasheet's single-supply electrical characteristics table.
How is logic compatibility configured on the DG445DY+T, and what happens if VL is left unconnected?
Logic compatibility is set via the VL pin: connect to +5V for TTL-level inputs (VIH = 2.4V, VIL = 0.8V), or tie to V+ for CMOS-level thresholds. If VL is left floating, the internal protection diodes may forward-bias unpredictably, causing erratic switching or excessive supply current. Maxim explicitly requires VL to be externally biased - no internal pull-up or pull-down is provided.
What is the guaranteed on-resistance matching specification for the DG445DY+T, and under what conditions does it apply?
The DG445DY+T guarantees on-resistance matching of ≤4Ω max between any two channels, but only under bipolar-supply operation (e.g., ±15V) and at TA = +25°C. This parameter is not guaranteed under single-supply conditions or across temperature extremes. The matching is measured with VD = ±10V and IS = -10mA, per Note 4 in the datasheet's Electrical Characteristics table.
Can the DG445DY+T be used in a hot-swap or live-insertion application, and what precautions are recommended?
The DG445DY+T is not rated for hot-swap operation. Power-supply sequencing is mandatory: V+ must be applied first, followed by VL, then V-, and finally logic inputs. Violating this sequence risks latch-up or permanent damage. For live-insertion scenarios, external blocking diodes (as shown in Figure 1 of the datasheet) are required to limit analog terminal voltage to within 1V of V+/V-, though this reduces usable signal range by 2V.
DG445DY+T Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Switch Circuit:
- SPST - NO
- Multiplexer/Demultiplexer Circuit:
- 1:1
- Number of Circuits:
- 4
- On-State Resistance (Max):
- 85Ohm
- Channel-to-Channel Matching (ΔRon):
- 4Ohm (Max)
- Voltage - Supply, Single (V+):
- 10V ~ 30V
- Voltage - Supply, Dual (V±):
- ±4.5V ~ 20V
- Switch Time (Ton, Toff) (Max):
- 250ns, 170ns
- -3db Bandwidth:
- -
- Charge Injection:
- 5pC
- Channel Capacitance (CS(off), CD(off)):
- 4pF, 4pF
- Current - Leakage (IS(off)) (Max):
- 500pA
- Crosstalk:
- -100dB @ 1MHz
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 16-SOIC
DG445DY+T FAQ
1.How can I place an order for DG445DY+T through Aetrix?
Please submit a Request for Quotation (RFQ) for DG445DY+T on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.
2.Are the price and stock information for DG445DY+T reliable?
The price and inventory of DG445DY+T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for DG445DY+T is usually 5 days.
3.What payment methods are accepted for DG445DY+T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for DG445DY+T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for DG445DY+T?
DG445DY+T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your DG445DY+T order is processed, you will receive an email with the shipment details and tracking number.
Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.
5.How can I obtain technical support or documentation for DG445DY+T?
For technical support, including DG445DY+T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your DG445DY+T requirements.
6.How does Aetrix verify that DG445DY+T is sourced from the original manufacturer or authorized distributors?
All DG445DY+T products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that DG445DY+T meets industry standards.
7.What is the process for return or replacement of DG445DY+T?
All DG445DY+T units undergo pre-shipment inspection (PSI). If there is an issue with DG445DY+T, returns or replacements are accepted under the following conditions:
1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.
2.The issue is reported within 90 days of delivery.
3.The DG445DY+T part is unused and in its original packaging.
Return procedure for DG445DY+T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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